Document O3adrRq4g64mvLQEBO9zoN6o1

1' Windsor mjncrals inc <0*0 347 \ POS*tt WNir Vwm february 3, 1977 a> Georfia Pacific Corporatise 14030 South Most 72nd Tigard, OE 97223 5 ATTN: Mr. Bill Gettal Sr. Product Development Engineer Dear Sir: Attached you will find a copy of m article entitled TTASBESTO.S.:......S...t.i.. Some Problems from the * "19, 1'"977 rsuissue of "Construction Dimensions" which we Donave you will find interesting. ( 0 Our Grade TC-100 Tale continues to have growing accept ance as a raw (material for formulating joint compound** ceiling and wall sprays, taxxttuurresas,f ipscsLliea srd` cau"lki`ng compounds, which seat present sod anticipated rsqulresents regarding aabestoe end quart*; contamination. We ara sure that with thprou^i evaluation of Grade TC-uj(> Talc you will find the Marketable end economic advantage* ' that many manufacturers have found with the **e of our product. I j Tours vary tally* > ; imrosot mduals wc. | av : David P. teat ; Manager of Sales DPL:rg Enc. t 1, 4- ^ ASa^STOS: San sorm. Problems a Intpectiofis Disch** Thst Some Ccntreciort Appsrtttty Are tUU Ueing A*t>esto*Co<*tsiiiing Meterleh I be 4'Msios threat m construeK>n industry u-orWers '-tilt ftitll. Despite the introduction of asnesiosuee .ulation material* and ih* existing bans on the use of asoestos-containinf spray fire* proofing, a quick check by gov ernment inspectors 1-4*1 'month showed that some contractors are stH us-ng materials that exceed the new federal mandates The federal asbestos standard of ' asbestos libers. which are longer than 5 rmcrt>meier*. per cubic ce* timeter of air on an S-hour umeweighted average went into effect July I. ISi?6 The major manufacturers have m'rod'iced waiiboard finishing compounds, -nd speckle, which are asbestos free But inspect** showed that some contractors are still using material* that contort Mgnifkani amounts of chrysotdt asbestos fh.s is released into the ai' as Jus! either during the dry iti'-ig ,'f these compounds or dor- ng 4nrjmg Shortly A-.'r-. iVorld War II. >)rv <* 4 ii <j',,r\g compounds came -I,. .* o . yper.ut use The materials ..se-t .1 me >. `istruCtKin site were, .nn. *4.-.y ir.entiy. creating large v .ouds ( <tl|SI S.nce 'r>e . ner scare 4nd govfminenial .nmaiivet tti reduce the asnestos exposure, many rors have swuched to premised , (impound* What's Supplied P.e >dv ini.-ge i>f switching. 'H.u.^n depends -ti ttie contractor `>1/1 and what he lupplist hie workmen There are worn iromrocton who strtl find need to uee the dry-e** brand* Mixing of tshcoet cootamine tpackle material can create dwtf concentration* that exceed the cur rent asbestos standard by more than tea times. But even the use of rendy-mued compounds leaves the problem of dust, li t produced when the dned compound is landed, prior to paintmg. Wort habits vary. Taper*, or thee apprentices, do thee owe sanding to some twliCat of the country la others, the painter* art left (o fmrth the jab. The sanding is often dona while other men are working ia the same teoa or area. Samples T&m To determine ftic Iguei of expo are. the Eavroamaotil Sciences Laboratory last year took a*e mm* pits at iibcmd job site* m Near York City white taper* mere work* Ptr%on*t samples taken during pole sandipg ranged from 1 ' fibers per mdlilitar iCmi) to 19.3 Pml; ia an adjacent room, at a distance of 33 feet from the under, a level of t S fml was found. Hand leading levels ringed from I 1 to 16 9 Cad m the breathmg rone of th< workers, and a high of t l fml was uken <a an adjacent tnom at distance of 13 feet A breathing rone sample taken dicing Jcv mttmg was found to contain ?0ad. though a 13-mmuse lapse dropped the level *0 5 Chai. Cunuderabie gpantrtie* of set tled duxr were ttuacd up after vend<eg operations Thwty-flve minutes after sweeptag ad the she of the sanding. a fiber tonceMrmion of 26 * (`mi was obtmned (a view of .aese fmdmgx. the me of respiratory pnwecru* and rw*> fid ckaa^rp in enter 10 reduce (ha risk of inhaling nbrrtoi few ctearfy warranted. A respiraior should be n ra by senders sod by aay other a when who no) be m adjacet anas bde thin work is m gropran Ufeere possfote. other morters should be wsuweted to wad to alow the dust settle. A vseoum is pt<uiod for draw up. as tern as the dust t* settied. To further runmure <hr* clouds, the floor should be dompeood when a vacuum oai waed and sweeping the only alterna te*. The sweeper should wear a mask- 3flfihte sondug may represent otdy a mmI gen of the cawruc lion activity it* danger should act bo eiiftinuted. Even wheo expo sure duration 1* short, the cumuli > live effect of repeated short term exposures to ineaiurahk concon union* of asbestos fibers can be serious A medical study of 69 drywofl tapers m New York revealed the 1ngr~i of continued exposure Of the group of 69. tome two-thud* had an exposure of 10 years duratmti and 61 were smokers or ex smokers. Yet, Xmj abnormelMtts characteristic of asbestos exposure were found m >7 out of 63 ftlot*. Again, the rupee manufacturers have developed new formulation* that err free of asbestos Contrac tors are encouraged to juuomee the products of these supphers. C U